Mobile Communication Set 3
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This set of Mobile Communication Multiple Choice Questions & Answers (MCQs) focuses on Mobile Communication Set 3
Q1 | Discretization of multipath delay axis of impulse response into equal time delay segments is called __________
- Excess delay bins
- Delay bins
- Discrete bins
- Digital bins
Q2 | In cellular telephone network, which component controls the switching between public wireline telephone network and the base station of cells for supporting the different calls between landline to mobile, mobile to landline and mobile to mobile calls?
- Electronic Switching Center (ESC)
- A Cell Controller
- Radio Transmitter & Receiver
- A common communication protocol
Q3 | In a cellular telephone system, which type of interference results from imperfect design of filters in receivers by allowing nearby frequencies to enter the receiver?
- Co-channel Interference
- Adjacent-channel Interference
- Both a and b
- None of the above
Q4 | If the system is designed with the usage of hexagonal-shaped cells, how are the base-stations located?
- At the centre of cell
- At the edge of cell
- At the corner of the cell
- All of the above
Q5 | Station Busy is sometime called
- Fast Busy
- Slow Busy
- Short Busy
- Long Busy
Q6 | Which of the following is not an advantage of micro cell zone technique?
- Reduced co channel interference
- Improved signal quality
- Increase in capacity
- Increasing number of base stations
Q7 | Which of the following is not a channel parameter?
- Bandwidth
- Coherence time
- Rms delay spread
- Doppler spread
Q8 | Flat fading channel is also known as _____
- Amplitude varying channel
- Wideband channel
- Phase varying channel
- Frequency varying channel
Q9 | For fast fading channel, the coherence time of the channel is smaller than _______ of transmitted signal.
- Doppler spread
- Bandwidth
- Symbol period
- Coherence bandwidth
Q10 | The received power of a wideband signal fluctuates significantly when a receiver is moved about a local area. State whether True or False.
- True
- false
- Both A and B
- Cant Say
Q11 | Why is the phase of individual multipath components are not received in RF Pulse system?
- Due to use of duplexer
- Due to use of ADC
- Due to use of flip flops
- Due to use of envelope detector
Q12 | Anyone who uses atelephone or data modem on the telephone circuit is a part of globle communication network called as__________________ and the pair of wires connecting a subscriber to the closest telephone office is called as ____________________.
- Personal Mobile Telephone Network,Twisted Pair
- World Wide Web, Subscriber Line
- Internet, Drop Line
- Public Telephone Network, Local Loop
Q13 | The free space model predicts that received signal decays as a function of _____
- Gain of transmitter antenna
- T-R separation
- Power of transmitter antenna
- Effective aperture of the antenna
Q14 | Which hand-off stage deals with the relinquishment of unnecessary frequency channels by keeping the availability for other mobile users?
- Initialization
- Resource Reservation
- Call Execution
- Call Completion
Q15 | Differentiate GSM and DECT.
- Both B and C
- GSM -Range is up to 70km. DECT-Range is limited to about 300m.
- GSM- Global systems for mobile communications DECT- Digital enhanced cordless elecommunications
- None of the above
Q16 | ______ leads to time dispersion and frequency selective fading. What is characteristic of flat fading?
- Doppler spread, Mobile radio channel has constant gain
- Multipath delay spread, Non linear phase response
- Time dispersive parameters, Linear phase response
- Frequency delay spread,Bandwidth is greater than the bandwidth of transmitted signal
Q17 | Power delay profile and magnitude frequency response of a mobile radio channel are related through _______
- Laplace Transform
- Fourier Transform
- S Transform
- Wavelet Transform
Q18 | _____ and coherence bandwidth are inversely proportional to one another.Coherence bandwidth is a statistical measure of range of frequencies over which channel is considered _______
- Rms delay spread, Flat
- Mean excess delay,Frequency selective
- Excess delay spread,Time variant
- Doppler spread, Time dispersive
Q19 | Verify True or False A.Frequency domain channel sounding technique do not require hard wired synchronization between transmitter and receiver. B.There is no relationship between time domain and frequency domain techniques.
- Both Statements True
- Both Statements False
- Only A true
- Only B true
Q20 | Which of the following is not an advantage of spread spectrum channel sounding system?
- Real time
- Rejection of passband noise
- Coverage range improvement
- Less transmitter power required